Grinding-mill.



O. J. REGAN.

GRINDING MILL.

APPLICATION FILED APR.5,1911,

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C. J. REGAN.

GRINDING MILL.

APPLICATION FILED APR.5,1911.

Patented Mar. 19, 1912.

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UNITED STATES PATENT OFFICE.

CORNELIUS J'. REGAN, OF QUINCY, MASSACHUSETTS.

GRINDING-MILL.

To all whom it may concern:

Be it known that I, CORNELIUS J. REGAN, a citizen of the United States of America, and a resident of Houghs Neck, Quincy, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to grinding mills and particularly to devices of thisclass that are designed for use in the manufacture of chocolate and in which the various ingredients are adapted to be thoroughly ground and mixed.

The invention consists in certain novel features of construction and arrangement of parts which will be readily understood by reference tothe description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a plan of a machine embodying the features of the present invention. Fig. 2 represents a vertical section of the same, the cutting plane being on line 22 on Fig. 1. Fig. 3 represents a section of a portion of a rotary grinding member and its co-acting casing wall, the cutting plane being on line 3 on Fig. 2. Fig. 4 represents a similar section, the cutting plane being on line 4 on Fig. 2. Fig. 5 represents a similar section, the cutting plane being on line 5 on Fig. 2. Fig. 6 represents an elevation of the flanged end of the casing member, and Fig. 7 represents a diagrammatic longitudinal section of one wall of the rotatable grinding member showing the inclined grooves thereon.

Similar characters designate like parts throughout the several figures of the drawmgs.

In the drawings, 10 represents a supporting frame upon which is mounted the casing member 11 provided with the conical chamber 12 extending longitudinally thereof and having at its smaller end a cylindrical extension 13. Communicating with this cylindrical extension are the inlet pipes 14, preferably positioned in alinement with each other on opposite sides of said chamber 13. These inlet pipes 14 are adapted to be connected with the mixing kettle, and have interposed between said mixing kettle and the grinding mill a pump to pump the material from the kettle into the chamber 13. On one end face of the casing 11 is secured an end plate 15 provided with bearings 16 adapted to receive the revoluble shaft 17 ex- Specificationof Letters Patent.

Application filed April 5, 1911.

Patented Mar. 19, 1912.

Serial No. 619,440.

tending through the center of the chamber 12, with its opposite end mounted in the bearing 18 secured to the opposite end face of the casing 11. This member 18 has formed therein a delivery chamber 19 for the material ground and mixed in the chamber 12. Extending downwardly from this chamber 19 is a delivery spout 20 by which the material in the chamber 19 is adapted to be delivered to any suitable receptacle.

Secured to and revoluble with the shaft 17 is a cone-shaped grinding member 21, between the smaller end of which and the end plate 15 the shaft 17 has secured thereto a cylindrical member 22 provided with worm grooves 23. At predetermined distances apart, the periphery of the grinding member 21 is provided with annular grooves 24 and 25, the groove 24 having a greater depth than the groove 25. Between the member 22 and the groove 24, the periphery of the grinding member 21 is provided with a plurality of helical grooves 26, having considerable inclination to the axis of the shaft 17. These grooves 26 are deeper at the smaller end of the cone-shaped grinding member than at their opposite ends where they connect with the groove 24. As has been previously stated, the groove 24 is of greater depth than the groove 25 and extending from the groove 24 with the same depth at that end as said groove are a plurality of grooves 27 of less width than the grooves 26 and of less inclination to the axis of the shaft 17. At the opposite ends of these grooves 27 they have the same depth as that of the groove 25. Between the groove 25 and the larger end face of the conical grinding member 21, the periphery of said grinding member is provided with a plurality of other grooves 28 which are narrower than the grooves 27 and extend substantially longitudinally of said grinding member. All of these grooves, 26, 27, and 28, are preferably semi-cylindrical in cross section.

In the smaller end of the chamber 14 its wall is provided with a plurality of semicylindrical grooves 29, while the remaining wall of said chamber is left perfectly smooth. The shaft 17 is revolved in the direction of the arrow a on Fig. 2, and it is obvious that as the grinding member 21 rotates the inclined walls of the worm grooves 23 and the helical grooves 26 and 27 will force the material in the receiving chamber 13 toward the larger end of said chamber 12 and finally deliver the material into the delivery chamber 19 for delivery through the spout 20. The action of the inclined walls of the grooves 26, co-acting with the longitudinal grooves 29 in the wall of the chamber 12, will be such as to thoroughly grind and mix the various materials being pumped into the chamber 13 and forced into the chamber 12 by means of the worm member 22. After the walls of the grooves 26 and 29 have operated upon the material passing through said grooves to grind and mix them, this material is forced into the grooves 27, and as it is forced through said grooves during the rotation of the member 21, the diminishing depth of these grooves in the direction of movement of the material will act to still further crush and mix the material and cause it to pass from said grooves 27 into the annular groove 25 in a pulverized condition. When the material is forced through the last series of grooves 28, owing to their lesser depth and final termination at the periphery of said grinding member at its larger end, the material is thoroughly crushed and freed from any lumpy portions, leaving it in a perfectly smooth condition having the same consistency throughout.

The shaft 17 has keyed thereto between the bearings 16 a bevel gear 30 meshing with a pinion 31 secured to and revoluble with a shaft 32 mounted in a bearing 33, andv having upon its opposite end a pulley 34, to which motion is imparted from any suitable source. The opposite end of the shaft 17 is provided with a flange 35 interposed between two series of anti-friction members 36 in a recess 37 formed in the adjusting wheel 38, said anti-friction members 36 being retained in position by the closing plate 39 secured to said adjusting wheel 38. This wheel 38 is provided with a hub 40 threaded to a bearing 18. This bearing 18 is provided with a flange 41 having therein a plurality of holes 42. Threaded or otherwise secured to the wheel 38 is a locking pin 43 adapted to enter one of the holes 42 and prevent the wheel 38 from movement about the axis of the shaft 17. It is obvious, however, that by removing the locking pin 43 from one of the openings 42, the wheel 38 may be turned about said casing and move the shaft 17 longitudinally to vary the distance between the wall of the chamber 12 and the peripheral surface of the grinding member 21. As the grinding member wears, it is necessary to make this adjustment so that the material passing through the mill will be properly ground to the desired consistency. WVhen these adjustments have been made, the locking pin 43 is inserted into another hole 42, and accidental movement of the adjusting members is prevented.

The casing 11 is provided with a water jacket 44 with which an inlet pipe 45 and outlet pipe 46 communicate. During the operation of the mill some suitable cooling medium is permitted to enter the chamber 44, and pass therefrom through the outlet 46, this cooling medium keeping the material in condition to be properly acted upon.

Attempts have been made to grind materials of this class by admitting the material into the larger end of the chamber, and forcing it by means of grooves in a rotating member into the smaller end of said chamber, from which it is ultimately delivered. It has been found in practice, however, to be very difiicult to successfully operate a machine thus constructed, as the material becomes clogged in the smaller end of the chamber and prevents the rotation of the grinding member. This objection has been wholly obviated by admitting the material at the smaller end of the conical chamber and forcing it through the various peripheral grooves on the grinding member toward the larger end thereof, said grooves having various inclinations, while at the same time the material is more quickly and effectively ground than it has been found possible to accomplish heretofore.

It is believed that the operation and many advantages of the invention will be thoroughly understood from the foregoing.

Having thus described my invent-ion, I claim:

1. In a grinder and mixer, the combination of a casing having a chamber the wall of which is provided with a plurality of longitudinal grooves; a revoluble member the periphery of which is in contact with the wall of said chamber and is provided with a plurality of annular grooves and a plurality of angular grooves between each pair of said annular grooves, said sets of angular grooves being each at a different angle to said longitduinal grooves; and means for admitting material to the end of said chamber.

2. In a grinder and mixer, the combination of a casing having a tapered chamber with a cylindrical extension therefrom; a revoluble tapered member within said chamber and provided with helical grinding grooves coacting with the wall of said chamber; a cylindrical extension to said revoluble member at its smaller end fitting the cylindrical extension of said chamber and provided wit-h a shallow worm groove; and a shallow annular groove communicating therewith between said worm groove and grinding surfaces and having the same depth as said worm groove and said helical tion of a casing having a chamber provided with a grooved inner wall and an inlet thereto near one end; a revoluble member the periphery of which is in contact with the wall of said chamber and is provided with grooves at a difierent angle to those in the chamber Wall; and a member having shallow helical grooves therein positioned within said chamber opposite said inlet for forcing material from said inlet into an annular groove with which said angular grooves communicate, said annular groove having the same depth as said helical and angular grooves at the point of communication therewith.

l. In a grinder and mixer, the combination of a casing having a chamber provided with an inlet thereto near one end; and a revoluble member within said chamber having in its periphery a plurality of sets of angular grooves and a plurality of annular mixing grooves between the various sets of angular grooves each corresponding in depth to that of the angular grooves communicating therewith.

5. In a grinder and mixer, the combination of a casing having a chamber provided with an inlet thereto near one end; and a revoluble member within said chamber hav ing in its periphery a plurality of sets of angular grooves and a plurality of annular mixing grooves between the various sets of angular grooves each corresponding in depth to that of the angular grooves communicating therewith, each set of angular grooves diminishing in angularity, width, and depth, from the smaller end of said revoluble member to its larger end.

6. In a grinder and mixer, the combination of a casing having a chamber; a revoluble member within said chamber provided with a plurality of annular shallow grooves in its periphery; peripheral grooves having the same depth as and connecting said annular grooves; and means for admitting material to the end of said chamber.

7. In a grinder and mixer, the combination of a casinghavingachamber; a revoluble member the periphery of which is in contact with the wall o'li' said chamber and is provided with a plurality of annular shallow grooves; peripheral grooves having the same depth as and connecting said annular grooves each set of connecting grooves varying in inclination; and means for admitting material to the end of said chamber.

8. In grinder and mixer, the combination of a casing having a chamber; a revoluble member within said chamber provided with a plurality of annular shallow grooves in its periphery; peripheral grooves having the same depth as and connecting said annular grooves, each set of grooves varying in inclination to each other, those of the set nearest the inlet end having a greater inclination than those near the delivery end; and means for admitting material to the end of said chamber.

9. In a grinder and mixer, the combination of a casing having a chamber the Wall of which is provided with a plurality of longitudinal grooves; a revoluble member the periphery of which is in contact with the wall of said chamber and is provided with a plurality of sets of grooves, said sets being at different angles to said longitudinal grooves and separated by annular peripheral grooves of the same depth as said angular grooves; and means for admitting material to the end of said chamber.

Signed by me at 4 Post Ollice Sq., Boston, Mass, this 4th day of April, 1911..

CORNELIUS J. REGAN.

Witnesses \VALTER E. LOMBARI), NATHAN C. LOMBARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

